Pressure and suction distributing mechanism



-Oct. 11,1927; L'mgz F. REMY PRESSURE AND SUCTION DISTRIBUTING MECHANISM Filed J il. 9, 1926 2 Sheets-Sheet 1 .2, f i I F. REMY PRESSURE AND SUCTION DISTRIBUTING MECHANISM 2 Sheets-Sheet :2:

Filed Jan. 9, 1926 /n ven fan;

Patented Oct. 11, 1927.

vr rss cearr FRANZ BET/LY; OF FOSSES-LEZ-NAMUB, BELGIUM;

PRESSURE AND SUCTION DISTRIBUTING MECHANISM.

Application filed January 9, 1926, Serial No. 80,329, and in Belgium January 16, 1925.

This invention relates to milking machines and more particularly to pulsators or pressure and suction distributing devices therefor. j

The principal object of the invention is to provide an improved pulsator for distributing pressure and suction to the milking cups in such a manner that periods in which suction is applied to the fronts milking cups and pressure to the rear milking cups alternate with periods during which pressure is applied to the front milking cups and suction to the rear milking cups the flexible suction elements in the milking cups being supplied with suction continuously. I

A further object of the invention is to provide improved and simplified valve mechanism for controlling thepressureand suction distribution operated automatically by a piston working in a cylinder which is connected to suction alternately at opposite ends by movements of the valve, the move ments of the valve being regulable by means of regulating valves in the suction connections to the cylinder to vary the frequency of the pressure and suction impulses which are transmitted to the milking cups.

With these and other objects in view the invention consists in the improved construction hereinafter described and claimed.

In the accompanying drawings y Figure 1 is a side elevation of" the pulsator, v Figure 2 is a plan view of the same Figure 3 is an end elevation,

Figure 4 is a detail view of the distrib u tion box with the cover and slide removed,

Figure 5 is a detail view of the slide,

a. Figure 6 is a detail viewshowing the ports in the distribution box cover, I

Figure 7 is a longitudinal section of the pulsaton'and, 1 Figure 8 is a transverse section thereof. As shown in the drawings the pulsator comprises a distributionrbox which is formed in one piece with a cylinder a containing a piston 19 which slides freely in the cylinder and is adapted to act on the'ends of two U-shaped tubes h, h which project through stuffing boxes 7L in the opposite ends of the cylinder and are free to slide'in said I stufiing boxes. The tubes ]L,'h also project through stufling boxes k in opposite endsof the distribution box jand areconnected at their ends to the opposite ends of a ported slide m working in the distribution box and adapted to be reciprocated longitudinally by the movement of the piston b acting through the tubes h, 78. l a

The distribution boxy carries a conduit (Z adapted to be connected to any suitable 001m pressed air vessel and a conduit 6 adapted to be connected to any suitable suction vessel. The lower wall 7' of the distribution box is formed with a pair of port openings I0 74 disposed in line with theaxis of the slide m as best shownin Figure l and with two pairs of ports Z Z and 3 disposed on opposite sides of the axis of the slide, the ports [6 y, y being connected to the suction conduit 6 whilst the ports Z Z are connected to the pressure conduit d.

The distribution box j is provided with a cover n which carries two pairs ofnipples i f, f and is formed on its lower surface with a pair of ports 79 p which register with the ports g g in the distribution boxand with I a pair of ports 0 0 which register with the ports Z Z in the distribution box, the ports 9 0 being connected tothe nipples f whilst the ports 29 0 are connected "with the nipples f shown in'Figure 6 which is a bottom plan view of the cover n.

The slide m is provided with two pairs of ports 03 x and 2 '2 which cooperate wlth the ports Z Z g if, 19 20 0 0 and which are so disposed that when the slide m is'in the position shown in Figure 7 the ports 2 e register'with the ports Z y and 0'-, thus putting the nlpples 7" into communication with the pressure conduit 0 through the ports 0 2 Z and'the nipples f into communication with the suctionconduit 6 through the ports 10 z g whilst when the slide m is moved to the opposite position to that shown in Figure 7 (i. e.

to the position in which it abuts the right hand end wall of the distribution box j as seen in Figure 7) the port 00 m registers with theportsl g and 0 ,19 thus putting the nipples 7" into comlnunicationwiththe suction conduit 6 and the nipples f with thepre'ssure conduit l. The'ni'pples f and f are thus alternately connected to pressure and suction when the slide m is reciprocated, the nipples 7 being connected to the pres sure whilst the nipples f connected to suetion and vice versa.

In order to operate the piston 32 the tubes h,' h are connected to ports I0 70 in the slide m which cooperate with the 'ports is,

k in the distribution box and are so dis- I the suction conduit 6.

posite sides of the piston Z) so that the piston reciprocates in the cylinder and moves the slide m by acting on the ends of the tubes h, h In order to admit air to the cylinder at the side of the piston opposite to that at which suction is applied the tubes h, 71, are provided with openings e', i which aredisposed within the cylinder when the tube is in its innermost position but which pass through the stutling box and conununicatewiththe atmosphere so as to admit air to the cylinder when the tube is pushed in the outward direction by the action of the piston b.

Regulating'valves w are provided in. the tubes h, k in order that the supply of suc tion to the cylinder may be regulated t control the speed of the piston.

In operation, the nipples f are connected by means of the usual flexible connections which form no part of the present invention to the front-milking cups whilst the nipples f are similarly connected to the rear milking cups. Assuming the parts to be. in the position shown in Figure 7 and that pressure and suction have been established in the conduits'd and c, the cylinder a is connected on one side of the piston 6 through the tubeh ports 70, 70 and conduit e to suction whilst on the, other side of the piston b the cylinder is connected to at- .mosphere through the tube It and openings 5. The piston therefore moves towards the right asseen iniFigure 7 and as it reaches the end of its movement it pushes the tube h outwardly of. the cylinder, thus moving the openings 1' through the stuliing box a into communication with the atmosphere and at the-same time shifting the slide m from the position shown in Figure 7 to the opposite position (i. e. to the position at which it abuts the right hand end of the casing of the box j as seen in Figure 7). In the new position, of the slide m the ports la 70 are out ofregister and the tube It is disconnected from the suction conduit but the tube It is connected to the suction conduit through the ports 70 70 thus supplying suction to the cylinder a at the left hand side of the piston as seen in Figure 7, the openings having been pushed through the stuil'ing box 7&1 into the cylinder, by the movement of the slide V m. Thus the piston I) new moves in the op posite direction and as it reaches the end of its movement it pushes the tube h outwardly of the cylinder and returns the parts to the position shown in Figure 7 whereupon the cycle of operation just described is repeated. a r

The slide m is thus regularly reciprocated in the distribution box 7' and the ports $0 2 .2 co-operate with the ports Z Z 3/ 3 to distribute pressure and suction to the nipples 7 and f as hereinbefore described, so that periods during which the nipples (and therefore the front milking cups) are connected to pressure whilst the nipples f (and therefore the rear milking cups) are connected tothe suction'alternate with periods during which the nipples f are connected to pressure and the nipples f to suction. The frequency of the alternations of pressure and suction can be controlled by the valves w which regulate the speed of the piston b and the apparatus can therefore be adjusted by the operator according to requirements.

For convenience in use the apparatus shown is provided with an additional suction conduit 9 not connected to the conduits (Z and e which isutilised for supplying suction continuously to the flexible suct-ion'elements of the milking cups. The connections to the conduit 9 form no part of the present invention and are therefore not described or in said cylinder, means controlled by said T slide for supplying suction to said cylinder alternately on opposite sides of said piston and reciprocating tubes secured to said slide and projecting into said cylinder at opposite sides of said-piston, said tubes also constituting the means for supplying suction to said cylinder.

2. Pressure and suction distributing mech anism for milking machines comprising a cylinder, a piston working in said cylinder, a distribution box, a reciprocating slide working in said distribution box, a cover on said distribution box, connections on said cover forconnecting to the milking cups, pressure and suction ports in said distribution box, ports in said cover communicating with said connections, co-operating ports in said slide,- tubes projecting slidably into said cylinder on either side of said piston, said tubes being secured to said slide and ports in said slide communicating with said tubes and each co-operating with one of said suction ports in said distribution box.

, FRANZ REMY. 

